Please, have a look at @jeff's excellent performance testing and comparison thread. I believe the AMD x86 device in the tables is an apu2: https://forum.openwrt.org/t/comparative-throughput-testing-including-nat-sqm-wireguard-and-openvpn/44724
Based on that thread I guess you might be able to get more than 200 Mbps with SQM but as so often, "conditions apply".
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